VEVOR RV Surge Protector, 30 Amp, 2700 Joules RV Voltage Protector Monitor Circuit Analyzer Power Guard, with Surge Protection Waterproof Cover Anti-Theft Lock for RV Camper Trailer, ETL Certified Item Model Number: LTU12 Voltage/Frequency: AC 125V, 60 Hz Rated Current: 30A Jopule Rating: 2700J Product Dimensions(L x W x H): 15.04 x 4.92 x 5.71 in/38.2 x 12.5 x 14.5 cm Package Size(L x W x H): 14.76 x 5.91 x 6.5 in/37.5 x 15 x 16.5 cm Net Weight: 1.76 lbs/0.8 KG Varistor: 6 x 14D471K(350J) & 2 x Ceramic Heating Tube 38.2 cm /15.04 in
eBay